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ห้องสมุดกรมพัฒนาที่ดิน

Abstract

The impact of extreme climate change on paddy rice and corn belt farming is
represented by five approaches, which are as follows: 1. Crop Yield Projection 2. The effect

of soil moisture on corn yield 3. Prepare the land for the next corn belt farming by burning
4. soil fertility, erosion, and fire impact 5. Corn farming with zero tillage in Mae Cham high
land sub basin, Chiang Mai province.
Rice and corn yield projections in 2030 and 2060 are more increasing than decreasing

when compared to the base year (2018-2020), with the average rice yield of 623 kg/rai as the
base year. The lower yield limit for rice is 601 kg/rai (-3.54 percent), while the upper yield
limit is 717 kg/rai (15 percent) . Furthermore, the average corn yield is 872 kg/rai in the base

year. The lower yield limit for corn is 879 kg/rai (0.87 percent), while the upper yield limit is
900 kg/rai (3.24 percent) . By not mulching and irrigating every four days, the effect of soil
moisture on corn production is 1,390 kg/rai and a high income of 7,897 THB/rai. Prepare the
land for the next corn belt harvest period by burning for 1,600 kg/rai and getting the highest
income of 8,837. 88 THB/ rai by manipulating no burn liter, plowing, following chemical

fertilizer recommendations, and applying 4 ton/rai organic fertilizer. The corn belt farming
area is 116,416 rai, with an annual soil loss of 613,716 tons. The amount and intensity of
precipitation is the primary climatic factor governing soil erosion by water. On the other hand,

soil fertility in the Mae Cham sub-basin is 3.08 percent OM. The Pair Sample T-test of soil
fertility shows that OM, C, and N are significantly different at the 95 percent confidence level.
Every year, there are 21 hotspots that cover 12,917 rai and emit 5,683 tons of CO2. The last
sub-project, corn farming with zero tillage and burnt the liter, yields a greater revenue of

8,837 – 10,284 THB/rai and a higher margin of 5,021 – 6,468 THB/rai. Climate change
adaptation may have no effect on cash crop productivity and income in the Mae Cham sub-
basin, but addressing current farm-level climate change adaptation efforts is critical to
determining their usefulness and implying policy level advance measures for the future.